Safe-D: Safety through Disruption

Lane Change Hazard Analysis Using Radar Traces to Identify Conflicts and Time-To-Collision

electronic wing mirror


This project analyzed existing data and assessed the safety equivalency of prototype video-based camera systems to support Federal Motor Vehicle Safety Standard 111 rulemaking efforts and investigate camera-based side view systems. The researchers mined an existing set of radar data surrounding real-world lane change events. The study was performed in Southwest Virginia using 36 drivers experiencing both conventional and camera-based systems over a month-long naturalistic exposure period (2 weeks conventional, 2 weeks camera-based). Study vehicles were instrumented with a data acquisition system to capture and record time-synchronized video and parametric measures from key-on through key-off (i.e., the entirety of each trip). Analyses focused on potential lane change conflicts and hazards identified using time-to-collision values (which in turn were derived from rear-mounted radar units) surrounding signalized lane change events. Results provided no compelling evidence to suggest that camera-based systems adversely affected lane change performance to lead to riskier or more hazardous lane changes compared to conventional mirror systems. Results instead suggested that camera-based systems, when appropriately designed, can help drivers detect potential conflicts because of the wider field of view afforded by these systems, enabling drivers to assess the presence of a vehicle in the target lane.

Project Highlights

  • Coming Soon

Final Report

05-082 Final Research Report

EWD & T2 Products

Coming Soon


Guduri, B. (2023, April 13). Lane Change Hazard Analysis Using Radar Traces to Identify Conflicts and Time-To-Time Collision Measures. Webinar SafeD Virtual Webinar is available here. PDF of PowerPoint slides from Webinar available here.

Final Dataset

The final datasets for this project are located in the Safe-D Collection on the VTTI Dataverse; DOI: 10.15787/VTT1/EWMRB8.

Research Investigators (PI*)

Eddy Llanares  (VT/VTTI)*
Cameron Rainey (VT/VTTI)
Shane McLaughlin  (VT/VTTI)
Balachandar Guduri (VT/VTTI)

Project Information

Start Date: 2020-01-10
End Date: 2022-03-15
Status: Active
Grant Number: 69A3551747115
Total Funding: $364,00
Source Organization: Safe-D National UTC
Project Number: 05-082

Safe-D Theme Areas

Automated Vehicles

Safe-D Application Areas

Risk Assessment
Planning for Safety
Performance Measures

UTC Project Information Form

Sponsor Organization

Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC 20590 United States

Performing Organization

Virginia Polytechnic Institute and State University
Virginia Tech Transportation Institute
3500 Transportation Research Plaza
Blacksburg, Virginia 24061